Usage:
Bigelow Brook Formation of Brimfield Group (CT*)
Bigelow Brook Member of Paxton Formation (MA*)
Geologic age:
Cambrian(?)*
Type section, locality, area and/or origin of name:
Type section (composite): lower and middle members in lower section northeast of Black Pond fault, along line from point on Crystal Brook Pond trending N. 29 deg. W. to where unpaved road crosses quadrangle border in Eastford quadrangle, Windham Co., CT. Middle and upper members in upper section, along line from intersection of North Ashford Road and unnamed road trending N. 54 deg. W. to point northwest of Lead Mine Brook and south of Susstek Road in Westford quadrangle, Windham Co., CT (Pease, 1972).
AAPG geologic province:
New England province*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).